Le magmatisme de la région de Kwyjibo, Province\ud du Grenville (Canada) : intérêt pour les\ud minéralisations de type fer-oxydes associées

The granitic plutons located north of the Kwyjibo property in Quebec’s Grenville Province are of\ud Mesoproterozoic age and belong to the granitic Canatiche Complex . The rocks in these plutons are calc-alkalic, K-rich,\ud and meta- to peraluminous. They belong to the magnetite series and their trace element characteristics link them to\ud intraplate granites. They were emplaced in an anorogenic, subvolcanic environment, but they subsequently underwent\ud significant ductile deformation. The magnetite, copper, and fluorite showings on the Kwyjibo property are polyphased\ud and premetamorphic; their formation began with the emplacement of hydraulic, magnetite-bearing breccias, followed by\ud impregnations and veins of chalcopyrite, pyrite, and fluorite, and ended with a late phase of mineralization, during\ud which uraninite, rare earths, and hematite were emplaced along brittle structures. The plutons belong to two families:\ud biotite-amphibole granites and leucogranites. The biotite-amphibole granites are rich in iron and represent a potential\ud heat and metal source for the first, iron oxide phase of mineralization. The leucogranites show a primary enrichment in\ud REE (rare-earth elements), F, and U, carried mainly in Y-, U-, and REE-bearing niobotitanates. They are metamict and\ud underwent a postmagmatic alteration that remobilized the uranium and the rare earths. The leucogranites could also be\ud a source of rare earths and uranium for the latest mineralizing events

Effect of multi mineral-vitamin D supplementation on metabolic profiles, hs-CRP and oxidative stress in pregnant women at risk for pre-eclampsia: a randomized controlled clinical trial

Background: The purpose of this study was to determine the favorable effects of multi mineral-vitamin D supplementation on metabolic profiles, serum hs-CRP and biomarkers of oxidative stress among Iranian pregnant women at risk for pre-eclampsia. Materials and Methods: This randomized single-blind controlled clinical trial was conducted among 48 pregnant women, primigravida, at risk for pre-eclampsia aged 18-40 years at their third trimester. Pregnant women were randomly assigned to receive either the multi mineral-vitamin D supplements (n=24) or the placebo (n=24) for 9 weeks. Fasting blood samples were taken at baseline and after 9 weeks of intervention to measure metabolic profiles, hs-CRP and oxidative stress parameters.Results: Consumption of multi mineral-vitamin D supplements as compared to the placebo resulted in a significant decrease in FPG (-11.7 vs. -2 mg/dL, P=0.01), serum insulin levels (-0.96 vs. 2.65 µIU/ml, P=0.04) and a marginally significant decrease in HOMA-IR (-0.34 vs.0.6, P=0.06). Also, multi mineral-vitamin D supplementation resulted in a significant decrease in serum hs-CRP levels as compared to the placebo (-1411.7 vs. 1503 ng/ml, P=0.01). Moreover, the mean changes for plasma TAC (151.94 vs. -19.69 mmol/l, P=0.002) and total GSH levels (205.82 vs. -32.3 µmol/l, P=0.02) were significantly different between the two groups.Conclusion: In conclusion, consumption of multi mineral-vitamin D supplements for 9 weeks during pregnancy among pregnant women at risk for pre-eclampsia resulted in a significant decrease in FPG, serum insulin, hs-CRP and increased levels of plasma TAC and total GSH as compared to the placebo group